/Engine/Source/Runtime/RHI/Public/RHIGPUReadback.h
virtual void EnqueueCopy ( [FRHICommandList](API\Runtime\RHI\FRHICommandList) & RHICmdList, [FRHITexture](API\Runtime\RHI\FRHITexture) * SourceTexture, const FIntVector & SourcePosition, uint32 SourceSlice, const FIntVector & Size )